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Mobile phone back cover and preparation method thereof

A mobile phone back cover and solvent technology, which is applied to manufacturing tools, ceramic molding machines, telephone structures, etc., can solve problems such as hidden safety hazards, cracking of mobile phone back covers, and large equipment investment, achieve high molding accuracy, and avoid defects such as cracking. , the effect of simple operation

Active Publication Date: 2021-03-26
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects in the prior art that the back cover of the mobile phone is easily cracked by using zirconia cast sheet molding. defect and provide a kind of mobile phone back cover and preparation method thereof, the molding precision of the mobile phone back cover prepared by this method is high, yield rate is high and not easy to crack, and this method does not need high-pressure condition, and process is simple, and cost is low; The method of extension and the method of blister are combined to prepare the back cover of the mobile phone

Method used

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  • Mobile phone back cover and preparation method thereof

Examples

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Effect test

preparation example Construction

[0028] The second aspect of the present invention provides a method for preparing a mobile phone back cover, wherein the method includes the following steps:

[0029] (1) ceramic powder, dispersant, binding agent, plasticizer and solvent are mixed and prepared into casting slurry;

[0030] (2) preparing the cast slurry into a cast sheet by tape casting; and

[0031] (3) Blister molding after softening the casting sheet.

[0032] According to the present invention, in step (1), the particle size in the casting slurry can be 0.2-10 μm, and the viscosity of the casting slurry can be 1-20 Pa·s; preferably, the casting slurry The particle diameter of the extension slurry is 0.5-5 μm, and the viscosity is 3-12 Pa·s.

[0033] Preferably, the solvent is n-butanol and ethanol, based on 100 parts by weight of the casting slurry, the amount of n-butanol is 15-25 parts by weight, and the amount of ethanol is 10-15 parts by weight.

[0034] According to the present invention, in step (1...

Embodiment 1

[0046] This embodiment is to illustrate the mobile phone back cover prepared by the method of the present invention.

[0047] (1) Casting slurry

[0048] With 58 parts by weight of yttrium oxide stabilized zirconia powder, 20 parts by weight of n-butanol, 12 parts by weight of ethanol, 2 parts by weight of castor oil, 5 parts by weight of polyvinyl butyral (PVB), 3 parts by weight of phthalic acid Dibutyl phthalate and polyethylene glycol were ball-milled and mixed for 3 hours at room temperature, wherein the ratio of dibutyl phthalate to polyethylene glycol was 1:1, and the prepared cast slurry was vacuum defoamed for 20 minutes;

[0049] Among them, the particle size of the casting slurry is 4.2 μm, and the viscosity is 10 Pa·s;

[0050] Wherein, the conditions of ball milling are: the rotational speed of ball milling is 400r / min, the temperature in ball milling tank is 25°C, and the time of ball milling is 3h;

[0051] (2) tape casting

[0052] The casting slurry is scra...

Embodiment 2

[0061] This embodiment is to illustrate the mobile phone back cover prepared by the method of the present invention.

[0062] The mobile phone back cover was prepared according to the same method as in Example 1, except that the casting sheet was heated to 100° C. in an oven and softened for 2 hours.

[0063] Results The prepared mobile phone back cover S2 had a thickness of 0.45 mm, a molding precision of ±0.03 mm, and a good product rate of 88%; and the performance test of the mobile phone back cover S2 is shown in Table 1.

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Abstract

The invention relates to the field of mobile phone rear covers, and discloses a mobile phone rear cover and a preparation method thereof. The mobile phone rear cover is obtained by casting casting slurry into a casting sheet, softening the casting sheet, and carrying out plastic suction molding, wherein the casting slurry contains ceramic powder, a dispersant, a binder, a plasticizer and a solvent. The mobile phone rear cover and the preparation method thereof are provided for aiming at defects that a method involves complex processes such as a high-pressure process, has certain potential safety hazards and is large in equipment investment, the mobile phone rear cover prepared through the method is high in forming precision, high in yield and not prone to cracking, and the method does notneed a high-pressure condition, the technological process is simple, and the cost is low. The mobile phone rear cover is prepared by combining a casting method and a plastic uptake method.

Description

technical field [0001] The invention relates to a mobile phone back cover, in particular to a mobile phone back cover and a preparation method for the mobile phone back cover. Background technique [0002] With the continuous development of smart phones, the material of the shell of the mobile phone is becoming more and more diverse, for example, plastic material, which is the most common and familiar material, among which PC (polycarbonate) is the most common and familiar, However, the plastic material is easily deformed and damaged; the metal material, the metal back shell in the market currently occupies a large part, and the metal material is more complicated than the plastic material in terms of technology, and its cost is also much more expensive. , especially some relatively advanced metals, such as aluminum alloys, titanium alloys, etc., so metal is the material that best reflects the manufacturer's industrial design capabilities. Its advantages lie in high hardness ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622B28B1/29H04M1/18
CPCB28B1/29C04B35/48C04B35/622C04B2235/3246H04M1/18
Inventor 徐述荣许恩惠邓利军林信平
Owner BYD CO LTD